depot/third_party/nixpkgs/pkgs/build-support/make-darwin-bundle/default.nix

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# given a package with an executable and an icon, make a darwin bundle for
# it. This package should be used when generating launchers for native Darwin
# applications. If the package conatins a .desktop file use
# `desktopToDarwinLauncher` instead.
{ lib, writeShellScript, writeDarwinBundle }:
{ name # The name of the Application file.
, exec # Executable file.
, icon ? "" # Optional icon file.
}:
writeShellScript "make-darwin-bundle-${name}" (''
function makeDarwinBundlePhase() {
mkdir -p "''${!outputBin}/Applications/${name}.app/Contents/MacOS"
mkdir -p "''${!outputBin}/Applications/${name}.app/Contents/Resources"
if [ -n "${icon}" ]; then
ln -s "${icon}" "''${!outputBin}/Applications/${name}.app/Contents/Resources"
fi
${writeDarwinBundle}/bin/write-darwin-bundle "''${!outputBin}" "${name}" "${exec}"
}
preDistPhases+=" makeDarwinBundlePhase"
'')